Mikołaj Błociszewski
Mikołaj Błociszewski of Ostoja coat of arms - the court knight and deputy of King Jogaila to negotiate with the Teutonic Knights. He was Castellan of Sanok judge of Poznań and Lord of Greater Poland.
He was born in one of the ancestral villages, which among others included Brodnica today part of the Kuyavian-Pomeranian Voivodeship, Błociszewo in Śrem County and Rąbiń in Kościan County, Greater Poland Voivodeship. Mikołaj was the son of Świętomir Błociszewski de Błociszewo of the Clan of Ostoja. He married Dorothy, daughter of Dominic Jeżewski.
Together with his brother Jan he originally owned properties estates of Błociszewo, Brodnica and Grabianowa. In 1408 he received permission from Wojciech Jastrzębiec, the bishop of Poznań to build a church in Błociszewo, although the property estate of Błociszewo was lately passed to his older brother Jan. Their sister was probably Formosa de Rąbin that around the start of the 15th century led a process for payment of her part of the property. Mikołaj Błociszewski received nomination to Castellan of Sanok in 1401 and was in charge of it to 1415 as he then became judge of Poznań and Lord of Greater Poland.
He was sent by polish King to negotiate peace treaty with Teutonic Knights and negotiations with King Sigismund von Luxemburg that mediated between parts. On the polish side Mikołaj Błociszewski was negotiating together with Mikołaj Bydgoski, Castellan of Bydgoszcz and Hungarian baron, also from the Clan of Ostoja. On behalf of King Sigismund von Luxemburg the negotiations where led by Stibor of Stiboricz of the Clan of Ostoja. As the negotiations failed, war with the Teutonic Knights had to take place at the Battle of Grunwald.
